#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
#define FIREBASE_HOST "esp-mq2-67190-default-rtdb.firebaseio.com"
#define FIREBASE_AUTH "WhX8PV1vZeNcuLg9V5sBmBLdtpKsv4hVfYbw93ZP"
const char* databaseURL="https://esp-mq2-67190-default-rtdb.firebaseio.com/data.json";

#define DHT_PIN  5
#define ledred 27
#define ledblue 26
#define BUTTON 25
int button_state;
#define SCREEN_WIDTH 128 // OLED width,  in pixels
#define SCREEN_HEIGHT 64 // OLED height, in pixels

DHT dht(DHT_PIN, DHT22);


void setup(){
  // mở cổng giao tiếp serial để mở thông báo bên màn hình
  Serial.begin(9600);
  // kết nối wifi
  WiFi.begin(ssid, password);

  // kiểm tra wifi
  while(WiFi.status() != WL_CONNECTED){

    Serial.println("Connecting to wifi.........");
  }

  Serial.println("Connected to wifi");
  // bat dau cho cam bien doc
  dht.begin();
  pinMode(ledred,OUTPUT);
  pinMode(ledblue,OUTPUT);

}

void loop(){
  
  
  int but = digitalRead(25);

  // bien doc du lieu
  float DoAm = dht.readHumidity();
  float NhietDo = dht.readTemperature();

  
  // kiem tra du lieu xem co doc thanh cong kh( nan = error)
  // thanh cong dong goi sang goi chuoi JSON

    Serial.printf("do am: %.2f%% , nhiet do: %.2f°C\n", DoAm, NhietDo);

if((NhietDo>40)&&(NhietDo<70)){
      digitalWrite(ledred, HIGH);
      
      //digitalWrite(ledblue, LOW);
      }
    else{
      //digitalWrite(ledblue, HIGH);
      digitalWrite(ledred, LOW);
      }
  delay(1000);
  // send data to firebase = protocol HTTP
  String data= String("{\"nhiet do\":") + String(NhietDo) + String(",\"do am\":") + String(DoAm) + String("}");
  HTTPClient http;
  http.begin(databaseURL);
  http.addHeader("Content-Type", "application/json");
  http.addHeader("Authorization", FIREBASE_AUTH);

  int httpResponseCode = http.PUT(data);

  if(httpResponseCode > 0){
    Serial.print("Data sent successfully, respon code: ");
    Serial.println(httpResponseCode);
  }
  else{
    Serial.print("error sending data, response code: ");
    Serial.println(httpResponseCode);
  }

  http.end();
  delay(500);
  if(httpResponseCode == 200){
   String response = http.getString();
  float nhietDoFirebase = response.toFloat(); 
  }
  delay(500);

  

}